新版ADT中fragment布局与代码实现的关系

来源：互联网发布：mac homebrew 是什么编辑：程序博客网时间：2024/05/17 04:22

新版ADT中增加了Fragment，倾向于在Fragment.xml中实现布局，而不是Activity.xml中

之前的视频教程中代码实现部分都是放在Activity的OnCreate方法中，在新的ADT工具中会报错。新版实现如下

Fragment.xml

<span style="font-size:14px;"><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.android_4_3.MainActivity$PlaceholderFragment" >    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/hello_world" />    <Button        android:id="@+id/TEL_Button"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/editText1"        android:layout_below="@+id/editText1"        android:layout_marginTop="31dp"        android:text="OK" />    <EditText        android:id="@+id/editText1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/textView1"        android:layout_below="@+id/textView1"        android:layout_marginLeft="14dp"        android:layout_marginTop="26dp"        android:ems="10"        android:inputType="phone" >        <requestFocus />    </EditText></RelativeLayout></span>

对应的Java代码如下：

MainActivity.java

<span style="font-size:14px;">package com.example.android_4_3;import android.support.v7.app.ActionBarActivity;import android.support.v7.app.ActionBar;import android.support.v4.app.Fragment;import android.telephony.PhoneNumberUtils;import android.annotation.SuppressLint;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.ViewGroup;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;import android.os.Build;@SuppressLint("ShowToast") public class MainActivity extends ActionBarActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        if (savedInstanceState == null) {            getSupportFragmentManager().beginTransaction()                    .add(R.id.container, new PlaceholderFragment())                    .commit();        }    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {                // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }    /**     * A placeholder fragment containing a simple view.     */    public static class PlaceholderFragment extends Fragment {     protected static final int LENGTH_LONG = 0;EditText myEditText=null;     Button myButton=null;        public PlaceholderFragment() {        }        @Override        public View onCreateView(LayoutInflater inflater, ViewGroup container,                Bundle savedInstanceState) {                //rootView为fragment_main中所有控件集合        View rootView = inflater.inflate(R.layout.fragment_main, container,false);                  //获取TextView控件        myEditText = (EditText)rootView.findViewById(R.id.editText1);        //获取Button控件        myButton = (Button) rootView.findViewById(R.id.TEL_Button);                                 myButton.setOnClickListener(          new View.OnClickListener() {                  public void onClick(View v) {                           String TelNum=myEditText.getText().toString();         if(PhoneNumberUtils.isGlobalPhoneNumber(TelNum)){         Intent i=new Intent(Intent.ACTION_DIAL,Uri.parse(TelNum));                           }         else{         Toast.makeText(getActivity(), "error num", 1000)         .show();                  }         }          }          );                             return rootView;        }    }}

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